Jianbin Lai

same here, on MQTT V5 Jdk 13.01 on win10 pro x64

when I tried to change the "Socket closed" to "socket closed" in com.mbed.coap.transport.udp.DatagramSocketTransport, **it seems that it could solve this problem**, but I don't know whether this change is what...

> Hi @KeithLaiKB, > > How about checking against "`ocket closed`"? This was we would cover both cases. Please feel free to make PR. I think it could be ok...

> Look at the tests, they are using own self sign CA. You would need to create own keystore. I have a question is that, could the client just use...

> No, you would need to make a keystore. There is very hand GUI tool to create keystores: https://keystore-explorer.org/ > > Java does not support DTLS so you would need...

> I think this is not a problem. mqtt only have retained message that store only the last message that publish to a topic that no one subscribe, this is...

> That's right so in java-coap with TLS/SSL is based on TCP instead of UDP, right?